Fishing tool



Dec. 25,'1928. 1,696,200

G. H. HAIFLEY vFISHING TOOL Filed sept. 22, 1927 2 shuts-sheet 1 y j: 7 v

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G. H. HAIFLEY FISHING TOOL Filed Sept. 22. 1927 2 Sheets-Sheet 2 gwwntoc f f K .mlw

Patented Dee, 2 5, 192e.`

1,696,200 PATENT oFFIcE.

GEORGE H. HAIFLEY, F EUREKA, KANSAS, AssIGNon or ONE-HALF To GEORGE.. BERNARD, or EUREKA, KANSAS. 'p

l FISHING Toon.

Application filed September 22 1927. Serial 170.221,180.

This invention relates to improvements in fishing tools `for oil wells, and has particular f `reference to a tool for removing `washers and 1 lower cages from `the well or pump tubings e when the same become detached from the pump pistons.

`The primary object of the present invention is to provide a simple and efficient de vice which is adapted to be lowered into the pump tubing for the purpose of engaging the detached washers and lower piston so that when the `device is again raised the piston washers and cagewill be removed therewith from the pump tubing without the necessity of pullingthe latter from the well.

A 'further object is to provide a device of i the above'kind which is automatic in operaf tion and bv means of which a great amount of time, labor and annoyance is saved in the recovery of detached piston washers and cages.

Other objects are to provide means for preventing accidental expansion o'l the gripping members of the tool while the latter is being lowered into the tubing, and to provide means whereby the gri ping members may be readily released to e ect detachment of the washers and cage from the tool when the latter has been raised to the surface.

The invention consists in the novel form, combination and arrangement of parts hereirl-after more` fully described, shown in the accompanying drawings and claimed.

In the drawings,

Figure 1 is a vertical section through a well and a lower piston cage, illustrating the manner in which my device enters the cage.

Figure 2 is a view somewhat similaito Figure 1, illustrating the manner in which the device or tool operates for gripping' the cage. l

Figure 3 is a fragmentary vertical section on line 3-3Aof Figure 1.

Figure et is an enlarged horizontal section on line 4 1 of Figure 1.

Figure 5 is an enlarged horizontal section on line 5--5 of Figure 1, and Y Figure G is a perspective view oiE the wedgecarrying rod.

Referring more in detail to the drawings, the present invention embodies a tubular body 5 having a plurality ot' longitudinal slits 6 in the lower end portion thereof to define a plurality of resilient gripping members 7, the lower end portion of the body being `preferably externally threaded to provide the gripping members with threadengagmg teeth, as shown.

Removably applied to the upper end of Y the body 5 is a cap member including a tu bular member 8 of larger diameter thanthe body 5 and having a reduced lower part 9 removably threaded onto the upper endof the body 5, and member 10 on the upper end of member 8 formed with an upwardly pro# jecting threaded stem 114 by means of which the iishing tool is secured to theilower end of a rod 12 attached to the sand line by which the tool is lowered into the well tubing 13.-

Freely movable in and longitudinally off the body 5 is rod 14 that has a tapered head or wedge 15 rigid with the lower end thereof, the wedge 15 being movable upwardly into the lower end of the body 5 to expand the gripping members or jaws 7 and having a tapered or rounded nose 16 to readilyenter the detached washers and the detached lower piston cage 17. The rod 14 extends upwardly into the cap member 8 and has an enlargement or stop member 18 near its upper end adapted to engage the upper end of the body 5 when the wedge 15 is in lowered released position, so as to prevent excessive downward movement oif the rod 14a-nd the wedge relative to the body 5.

Provided in the cap member 8 are av pair of transversely alined openings 19 adapted to receive a frangible cross-pin or stick 20 so that the latter will overlie the upper end of rod 14 when the wedge is released, thereby preventing upward movement of the-wedge to jaw-expanding position should the wedge accidentally engage an object, such as when the tool is being lowered into the well tubing.

In operation, the fishing tool is lowered into the well until it comes in contact with the detached piston washers or cage. The tapered nose of the wedge guides the tool through the washers and into the cage, and when the wedge strikes the bottom of the cage as shown in Figure 2, the wedge and the rod 14 are forced upwardly relativeto the body 5 so as to break the frangible pin 20 and allowthe wedge to enter the body 5 so as to expand the jaws 7 into firm engagement with the cage 17 when the latter is internally threaded. The washers and cage are thus positively prevented from escaping from the tool and vmay then be 'lifted with the tool from the may be released suiiiciently to perinii' contraction of the jaws and removal of the cage andV washers from the tool.

Minor changes niay be made without departing from the spirit and scope of the invention as claimed.

That I claim as new is:

il. A fishing tool for oil'wells comprising a tubular body provided at its loweriend with a plurality of gripping jaws, a cap removab y applied to the upper end oi' the body and adapted for connection to a hoist line or the like, a rod freely longitudinally slidable in Jche bodyand project-ing upwardly into the cap, a wedge rigid with the lower end of the rod adapted to be forced uiiwardly by inipact with an object to expand the jaws, means to limit downward inoyeinent of the rod relative to the body, and a rangible member in the cap in the patli of said rod to prevent aeeideni'al upward displacement of the wedge to jaw-expanding position.

2. A fishing tool for oil wells comprising a tubular body provided at its lower end with a plurality of gripping jaws, a cap reniov ably applied to the upper end of the body and adapted for connection to a hoist line or the like, a. rod freely longitudinally slidable in the body and projectingupwardly into the 11p, a wedge rigid with the lower end of the rod adapted to be forced upwardly by iinpact wit-l1 an object to expand the j awzs, and nieans to-liinit downward inoven'ient of the rod relative to the body, said cap havinfr a pair o'lv transversely alined openings, an( a frangible pin positioned in the openings and across the upper end of said rod to prevent accidental displacement; of the wedge to jawexpanding position.

A fishing tool for oil wells comprisingsa tubular body provided at its lower end with a plurality `of gripping jaws and adapted for connection at its upper end to a `lioifst line or the like., a wedge supported at the' lower end of the body and adapted to be forced upwardly by `impart with an object to expand the jaws, and means ineluding; a frangible member to prevent accidental upward displacement of the wedge.

In testimony whereof I affix my signature.

GEORGE H. HAIFLEY. 

